@prefix ns0: <http://gcmd.gsfc.nasa.gov/kms#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/a60eb82b-e058-4b1d-bc09-864d886e8c48>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:definition """The Advanced Composition Explorer (ACE) is an Explorer mission that is
being managed by the Office of Space Science Mission and Payload
Development Division of the National Aeronautics and Space
Administration (NASA). The primary purpose of ACE is to determine and
compare the isotopic and elemental composition of several distinct
samples of matter, including the solar corona, the interplanetary
medium, the local interstellar medium, and Galactic matter.
The spacecraft is 1.6 meters across and 1 meter high, not including
the four solar arrays and the magnetometer booms attached to two of
the solar panels. It will weigh 785 kg, which includes 189 kg of
hydrazine fuel for orbit insertion and maintenance. The solar arrays
will generate about 500 watts of power at the beginning of life. The
spacecraft will spin at 5 rpm, with the spin axis generally pointed
along the Earth-sun line and most of the scientific instruments on the
top (sunward) deck.  The instruments that are carried on ACE are as follows:
Cosmic Ray Isotope Spectrometer (CRIS), Electon,Proton,and Alpha Monitor
(EPAM), Magnetometer (MAG), Solar Energetic Particle Ionic Charge Analyzer
(SEPICA), Solar Isotope Spectrometer (SIS), Solar Wind Electon, Proton, and
Alpha Monitor (SWEPAM), Solar Wind Ionic Charge Spectrometer (SWICS),
Solar Wind Ion Mass Spectrometer (SWIMS), and Ultra Low Energy Isotope
Spectrometer (ULEIS).

ACE launched on a McDonnell-Douglas Delta II 7920 launch vehicle on
August 25, 1997 from the Kennedy Space Center in Florida.
In order to get away from the effects of the Earth's magnetic field,
the ACE spacecraft has travelled almost a million miles (1.5 million
km) from the Earth to the Earth-sun libration point (L1). By orbiting
the L1 point, ACE will stay in a relatively constant position with
respect to the Earth as the Earth revolves around the sun.


Group: Platform_Details
   Entry_ID: ACE
   Group: Platform_Identification
      Platform_Category: Solar/Space Observation Satellites
      Short_Name: ACE
      Long_Name: Advanced Composition Explorer (ACE)
   End_Group
   Group: Synonymous_Platform_Names
      Short_Name: Explorer 71
      Short_Name: 1997-045A
      Short_Name: 24912
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: MAG
      Short_Name: SWICS
      Short_Name: SEPICA
      Short_Name: SIS
      Short_Name: SWEPAM
      Short_Name: EPAM
      Short_Name: SWIMS
      Short_Name: ULEIS
      Short_Name: CRIS
   End_Group
   Group: Orbit
      Orbit_Altitude: 1.5 million km
      Orbit_Inclination: 28.7 degrees
      Perigee: 179 km
      Apogee: 1256768 km
      Orbit_Type: LPO > L1 > Lissajous Orbit > Halo Orbit
   End_Group
   Creation_Date: 2008-01-14
   Online_Resource: http://www.srl.caltech.edu/ACE/
   Online_Resource: http://sd-www.jhuapl.edu/ACE/ACE_FactSheet.html
   Sample_Image: http://nssdc.gsfc.nasa.gov/image/spacecraft/ace1.jpg
   Group: Platform_Logistics
      Launch_Date: 1997-08-25
      Launch_Site: Cape Canaveral/Kennedy Space Center, USA
      Primary_Sponsor: NASA
      Primary_Sponsor: California Institute of Technology
   End_Group
End_Group"""@en ;
  skos:prefLabel "ACE"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/8e8b7689-0a8e-47a4-9c68-5f6a207104d5> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/8e8b7689-0a8e-47a4-9c68-5f6a207104d5>
  skos:prefLabel "Solar/Space Observation Satellites"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/a60eb82b-e058-4b1d-bc09-864d886e8c48> .